SMTP dot stuffing.. when and where to do it?

Question

I have found conflicting information about dot stuffing when transmitting an email.

1. stuff a dot if the line contains a single dot (to avoid premature termination)<

Answer 1

The practical answer: If you're using quoted printable format then always translate a dot to =2E. You can't rely on all smtp servers doing the dot removal correctly.

If you want to assume the whole world is standards compliant then go with answer 2 above.